had been/was

[bayan said]

Dear sir,
thanks for the last time,my question this time is:
I wrote this passage:it's a story i'm telling to my sister:
bayan-when I turned to take my sandwich befor leaving the bus I didn't find it someone had taken it..
sister:really?who had been hungry?
my question:which is right for the last sentence to say"who had been hungry?
or to say who was hungry?
(p.s:I said who had been hungry?because I'm asking about a person who( or that) had been hungry since I got tp the bus till befor leaving immediatly.
all the best

[MrPedantic]

Hello Bayan

Here's one possibility:

"When I turned to take my sandwich before leaving the bus, I didn't find it — someone had taken it..."
"Really? Was someone hungry?"

All the best,

MrP